Which of the following statement(s) about the modern periodic table are incorrect?
  1. The elements in the modern periodic table are arranged on the basis of their decreasing atomic numbers.
  2. The elements in the modern periodic table are arranged on the basis of their increasing atomic masses.
  3. Isotopes are placed in an adjoining group(s) in the periodic table.
  4. The elements in the modern periodic table are arranged on the basis of their increasing atomic number.
(a) Only (i)
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) Only (iv)

AcademicChemistryNCERTClass 10

Correct answer: (d) Only (iv)

Explanation:  All the elements in the modern periodic table are arranged on the basis of their increasing atomic number. All the isotopes can be placed at one place in the same group of the periodic table.

raja
Updated on 10-Oct-2022 13:19:22

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